1. R. W. Diesen, J. Chem. Phys. 44, 3662 (1966).JCPSA60021-9606
2. W. G. Valance and E. W. Schlag, J. Chem. Phys. 45, 216 (1966).JCPSA60021-9606
3. This quantity has also been referred to as the mean first passage time. It just represents the time it takes the initial molecules (mostly in low‐lying levels) to reach the critical energy E0 by a random walk, averaged over the initial ensemble.
4. (a) R. Fowler, Statistical Mechanics (Cambridge University Press, New York, 1955), pp. 60–62, 700–719;
5. (b) R. Fowler and E. A. Guggenheim, Statistical Thermodynamics (Cambridge University Press, New York, 1952), p. 499;